High level objective we are trying to achieve is to update kernel modules for storage and network  with OS layering. 

We are able to install driver RPM as a OS layer but rebuilding the initrd is failing with kernel panic when OS is booted.

To isolate the issue, we made a CoreOS layer that does nothing but rebuilding the initrd without adding any  kernel module. But we observed kernel panic after reboot. 

Detailed steps

--------------------

(1) Created a Docker file. Here's the content of the Containerfile

# oc adm release info --image-for rhel-coreos-8 4.12.14
FROM quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:90625d9f3713874b50b91b59b61d3a9d7c39c61ef38da8147c5d9203edfe50a9
RUN KERNEL=$(rpm -q kernel | cut -c 8-); dracut --reproducible -v --add 'ostree' -f --no-hostonly --omit-drivers 'nouveau' --omit 'nfs' --add 'iscsi' --add 'ifcfg' --add 'fips' --omit 'network-legacy' /lib/modules/$KERNEL/initramfs.img $KERNEL 

(2) Built the image using docker file. We got some warning/error messages while building. 'Build log is attached,

(3) Created a Machine Config:

apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker 
  name: initrd-trials
spec:
  osImageURL: quay.io/pkoppa0/initrd_trials

(4) ** Kernel panic was seen after reboot. Screenshot attached.